echo === create db
rm -rf db; mkdir -p db
mongod --dbpath db --storageEngine wiredTiger --logpath db.log --fork --syncdelay 0
sleep 1; sync # work around SERVER-17571
mongo --quiet --eval 'db.c.insert({x: 0})'

echo === shut down
killall -w mongod

echo === validate/update loop
mongod --dbpath db --storageEngine wiredTiger --logpath db.log --fork --syncdelay 0
mongo --quiet --eval '
    for (var i=0; i<10; i++) {
        db.c.validate()
        db.c.update({}, {$inc: {x: 1}})
    }
'

# crash
sudo bash -c 'echo 1 >/proc/sys/kernel/sysrq'
sudo bash -c 'echo b >/proc/sysrq-trigger'

2015-03-13T12:24:21.255-0400 E STORAGE  [initandlisten] WiredTiger (0) [1426263861:255456][2012:0x7f8fbc47cb80], file:collection-2-8220618549132206910.wt, session.open_cursor: read checksum error [4096B @ 8192, 3367698403 != 1510178857]
2015-03-13T12:24:21.255-0400 E STORAGE  [initandlisten] WiredTiger (0) [1426263861:255578][2012:0x7f8fbc47cb80], file:collection-2-8220618549132206910.wt, session.open_cursor: collection-2-8220618549132206910.wt: encountered an illegal file format or internal value
2015-03-13T12:24:21.255-0400 E STORAGE  [initandlisten] WiredTiger (-31804) [1426263861:255598][2012:0x7f8fbc47cb80], file:collection-2-8220618549132206910.wt, session.open_cursor: the process must exit and restart: WT_PANIC: WiredTiger library panic
2015-03-13T12:24:21.255-0400 I -        [initandlisten] Fatal Assertion 28558
2015-03-13T12:24:21.269-0400 I CONTROL  [initandlisten] 
 0xf4fd39 0xef9f81 0xeddb71 0xd78fda 0x13807f0 0x1380ab5 0x1380f54 0x12d9112 0x12f0ade 0x12ee878 0x12ef752 0x131779b 0x137fe68 0x137ff7a 0x1324cf1 0x137e26a 0x1335e33 0x137e0b1 0x137e4c5 0xd73f86 0xd6d4cb 0xd67264 0xd67bd3 0xd67ed9 0xd61d32 0xce21a6 0xce52dc 0xd60ba6 0xa6f8bd 0x7e20c0 0x7e7704 0x7f8fbb07afe0 0x7e02c9
----- BEGIN BACKTRACE -----
{"backtrace":[{"b":"400000","o":"B4FD39"},{"b":"400000","o":"AF9F81"},{"b":"400000","o":"ADDB71"},{"b":"400000","o":"978FDA"},{"b":"400000","o":"F807F0"},{"b":"400000","o":"F80AB5"},{"b":"400000","o":"F80F54"},{"b":"400000","o":"ED9112"},{"b":"400000","o":"EF0ADE"},{"b":"400000","o":"EEE878"},{"b":"400000","o":"EEF752"},{"b":"400000","o":"F1779B"},{"b":"400000","o":"F7FE68"},{"b":"400000","o":"F7FF7A"},{"b":"400000","o":"F24CF1"},{"b":"400000","o":"F7E26A"},{"b":"400000","o":"F35E33"},{"b":"400000","o":"F7E0B1"},{"b":"400000","o":"F7E4C5"},{"b":"400000","o":"973F86"},{"b":"400000","o":"96D4CB"},{"b":"400000","o":"967264"},{"b":"400000","o":"967BD3"},{"b":"400000","o":"967ED9"},{"b":"400000","o":"961D32"},{"b":"400000","o":"8E21A6"},{"b":"400000","o":"8E52DC"},{"b":"400000","o":"960BA6"},{"b":"400000","o":"66F8BD"},{"b":"400000","o":"3E20C0"},{"b":"400000","o":"3E7704"},{"b":"7F8FBB05B000","o":"1FFE0"},{"b":"400000","o":"3E02C9"}],"processInfo":{ "mongodbVersion" : "3.0.1-rc0", "gitVersion" : "3f999d764cdd307f779b27e3a28230b21bd43e25", "uname" : { "sysname" : "Linux", "release" : "3.17.4-301.fc21.x86_64", "version" : "#1 SMP Thu Nov 27 19:09:10 UTC 2014", "machine" : "x86_64" }, "somap" : [ { "elfType" : 2, "b" : "400000" }, { "b" : "7FFF0FBFE000", "elfType" : 3 }, { "b" : "7F8FBC052000", "path" : "/lib64/libpthread.so.0", "elfType" : 3 }, { "b" : "7F8FBBE4A000", "path" : "/lib64/librt.so.1", "elfType" : 3 }, { "b" : "7F8FBBC46000", "path" : "/lib64/libdl.so.2", "elfType" : 3 }, { "b" : "7F8FBB937000", "path" : "/lib64/libstdc++.so.6", "elfType" : 3 }, { "b" : "7F8FBB62F000", "path" : "/lib64/libm.so.6", "elfType" : 3 }, { "b" : "7F8FBB418000", "path" : "/lib64/libgcc_s.so.1", "elfType" : 3 }, { "b" : "7F8FBB05B000", "path" : "/lib64/libc.so.6", "elfType" : 3 }, { "b" : "7F8FBC26E000", "path" : "/lib64/ld-linux-x86-64.so.2", "elfType" : 3 } ] }}
 mongod(_ZN5mongo15printStackTraceERSo+0x29) [0xf4fd39]
 mongod(_ZN5mongo10logContextEPKc+0xE1) [0xef9f81]
 mongod(_ZN5mongo13fassertFailedEi+0x61) [0xeddb71]
 mongod(+0x978FDA) [0xd78fda]
 mongod(+0xF807F0) [0x13807f0]
 mongod(__wt_err+0x95) [0x1380ab5]
 mongod(__wt_panic+0x24) [0x1380f54]
 mongod(__wt_bm_read+0x72) [0x12d9112]
 mongod(__wt_bt_read+0x7E) [0x12f0ade]
 mongod(__wt_btree_tree_open+0x58) [0x12ee878]
 mongod(__wt_btree_open+0xD72) [0x12ef752]
 mongod(__wt_conn_btree_get+0x19B) [0x131779b]
 mongod(__wt_session_get_btree+0x2D8) [0x137fe68]
 mongod(__wt_session_get_btree_ckpt+0xCA) [0x137ff7a]
 mongod(__wt_curfile_open+0xE1) [0x1324cf1]
 mongod(__wt_open_cursor+0x26A) [0x137e26a]
 mongod(__wt_curtable_open+0x2E3) [0x1335e33]
 mongod(__wt_open_cursor+0xB1) [0x137e0b1]
 mongod(+0xF7E4C5) [0x137e4c5]
 mongod(_ZN5mongo17WiredTigerSession9getCursorERKSsmb+0x156) [0xd73f86]
 mongod(_ZN5mongo16WiredTigerCursorC1ERKSsmbPNS_16OperationContextE+0x4B) [0xd6d4cb]
 mongod(_ZN5mongo21WiredTigerRecordStore8IteratorC2ERKS0_PNS_16OperationContextERKNS_8RecordIdERKNS_20CollectionScanParams9DirectionEb+0x64) [0xd67264]
 mongod(_ZNK5mongo21WiredTigerRecordStore11getIteratorEPNS_16OperationContextERKNS_8RecordIdERKNS_20CollectionScanParams9DirectionE+0x43) [0xd67bd3]
 mongod(_ZN5mongo21WiredTigerRecordStoreC1EPNS_16OperationContextERKNS_10StringDataES5_bllPNS_28CappedDocumentDeleteCallbackEPNS_20WiredTigerSizeStorerE+0x2B9) [0xd67ed9]
 mongod(_ZN5mongo18WiredTigerKVEngine14getRecordStoreEPNS_16OperationContextERKNS_10StringDataES5_RKNS_17CollectionOptionsE+0x132) [0xd61d32]
 mongod(_ZN5mongo22KVDatabaseCatalogEntry14initCollectionEPNS_16OperationContextERKSsb+0x276) [0xce21a6]
 mongod(_ZN5mongo15KVStorageEngineC1EPNS_8KVEngineERKNS_22KVStorageEngineOptionsE+0x69C) [0xce52dc]
 mongod(+0x960BA6) [0xd60ba6]
 mongod(_ZN5mongo23GlobalEnvironmentMongoD22setGlobalStorageEngineERKSs+0x30D) [0xa6f8bd]
 mongod(_ZN5mongo13initAndListenEi+0x2F0) [0x7e20c0]
 mongod(main+0x134) [0x7e7704]
 libc.so.6(__libc_start_main+0xF0) [0x7f8fbb07afe0]
 mongod(+0x3E02C9) [0x7e02c9]